Brings up an internal dialog panel with a specified icon, where the number of choices is determined by the optionType parameter. The messageType parameter is primarily used to supply a default icon from the look and feel.

Parameters:

parentComponent     determines the Frame in which the dialog is displayed; if null, or if the parentComponent has no Frame, a default Frame is used

message     the object to display in the dialog; a Component object is rendered as a Component; a String object is rendered as a string; other objects are converted to a String using the toString method

title     the title string for the dialog

optionType     an integer designating the options available on the dialog: YES_NO_OPTION, or YES_NO_CANCEL_OPTION.

messageType     an integer designating the kind of message this is, primarily used to determine the icon from the pluggable Look and Feel: ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE, QUESTION_MESSAGE, or PLAIN_MESSAGE

icon     the icon to display in the dialog

Returns: an integer indicating the option selected by the user

`parentComponent`		determines the `Frame` in which the dialog is displayed; if `null`, or if the parentComponent has no Frame, a default `Frame` is used
`message`		the object to display in the dialog; a `Component` object is rendered as a `Component`; a `String` object is rendered as a string; other objects are converted to a `String` using the `toString` method
`title`		the title string for the dialog
`optionType`		an integer designating the options available on the dialog: `YES_NO_OPTION`, or `YES_NO_CANCEL_OPTION`.
`messageType`		an integer designating the kind of message this is, primarily used to determine the icon from the pluggable Look and Feel: `ERROR_MESSAGE`, `INFORMATION_MESSAGE`, `WARNING_MESSAGE`, `QUESTION_MESSAGE`, or `PLAIN_MESSAGE`
`icon`		the icon to display in the dialog